This thesis deals with the ethics of intensive animal farming, and in particular with the question of whether intensifying animal farming is ethically justified insofar as it helps mitigating climate change. From the assumption that we have an ethical obligation to mitigate climate change, this thesis offers an analysis of why we should or should not do so by promoting forms of animal farming that are otherwise deemed ethically problematic, for example because of their negative impact on animal welfare. Substantially, this thesis looks at the ethics of this climate change mitigating intensification through the different types of moral reasons involved in such action.